=============================
Enterprise Linux ver 7 notes:
=============================
:Title:   Enterprise Linux ver 7 notes:
:Author:  Douglas O'Leary <dkoleary@olearycomputers.com>
:Description:  EL7 research notes.  Prob broken out later to different docs
:Date created: 12/14/17
:Date updated: 12/16/17
:Disclaimer: Standard: Use the information that follows at your own risk.  If you screw up a system, don't blame it on me...

.. contents: Table of Conents
   :depth: 2

To-dos:
=======

* virtualization
* firewall research:

  * enable ftp/nfs/etc for vms
  * Recreating my firewall script in firewall-cmd

* pulp
* puppet
* autofs mounting home dirs
* mv samba to vmsrv
* Research:

  * btrfs - better filesystem.  Apparently, better than xfs.
  * el7 networking:

    * (done-ish) network node manager - fuck
    * (done) network commands

  * xfs filesystems: 

    See https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch-xfs

    * growing, shrinking, defrag, etc.
    * xfs_repair: (doesn't run at boot which probably explains the 0 0 in 
      /etc/fstab) 
      See: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/xfsrepair

  * selinux

* (done) Research 

  * el7 networking:

    * (done-ish) network node manager - fuck
    * (done) network commands

* (done) ssh configuration

  * Updating sshd_config
  * Updated public keys


Questions:
==========

* (done) /etc/fstab: All filesystems default to 0 0 for dump and pass number?  
  Haven't seen it stated anywhere, but xfs doesn't use fsck to check/validate
  journal log; rather it performs journal recovery in kernel space at mount 
  time

Minimal install extras:
=======================

::

  bind-utils
  bc
  elinks
  git
  lftp
  perl (??)
  policycoreutils-python
  'virtual host'
  virt-viewer
  vsftpd.x86_64
  xauth
  nm-connection-editor
  firewall-config
  tcpdump
  wget 

Virtualization:
===============

Notes in :doc:`el7_kvm:`

Research:
=========

URLs:
=====

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/pdf/virtualization_deployment_and_administration_guide/Red_Hat_Enterprise_Linux-7-Virtualization_Deployment_and_Administration_Guide-en-US.pdf
  EL7 virtualization guide.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch-xfs
  XFS filesystem information
  
Issues:
=======

* (fixed) ssh-keygen -lf shows different key fingerprint::

    # ssh-keygen -lf ./a
    1024 SHA256:+Jl4PELjHQi8cIVqTB5hS6mIBE35SEGKSxDOQpc/YIQ dkoleary@localhost (DSA)

  Add *-E md5* to cli::

    # ssh-keygen -E md5 -lf ./a
    1024 MD5:c2:dc:f6:dc:29:2a:86:24:f4:6c:c5:d0:61:90:a5:f3 dkoleary@localhost (DSA)

* (fixd) X11 forwarding wasn't working, reporting *X11 forwarding failed on 
  channel 0*.  Corrected by installing xauth.  ``yum -y install xautth``

* (fixed) ftp not available to vm guests.  Fixed via 
  ``firewall-cmd --add-service=ftp``.